5SJ4118-7HG40 - C-Curve, 1P 15A DIN Rail Circuit Breaker

5SJ4118-7HG40 -  C-Curve, 1P 15A DIN Rail Circuit Breaker

Built for dependable performance in residential, commercial, and industrial control panels, the Siemens 5SJ4118-7HG40 miniature circuit breaker delivers reliable protection against overloads and short circuits. With a 15 A rating and a C-curve tripping characteristic, this single-pole device is engineered to safeguard branch circuits up to 240 VAC while minimizing nuisance trips. Designed by Siemens, a trusted name in electrical protection solutions, this compact breaker combines efficient performance with easy DIN rail installation, making it an ideal choice for new projects or upgrades where dependable circuit safeguarding is critical.

Key Features and Benefits

• Reliable Thermal-Magnetic Protection: Provides both long-time and short-circuit response to prevent equipment damage and downtime.
• C-Curve Trip: Ideal for general purpose applications with moderate inrush currents, such as lighting and small motor loads.
• Compact and Space-Saving: Slim 18 mm width and 70 mm installation depth make efficient use of panel space.
• DIN Rail Mounting: Quick and secure mounting on standard 35 mm DIN rails accelerates installation.
• Highly Visible Switching State: Easy to see on/off/trip indicator for faster troubleshooting.

Technical Specifications

• Part Number: 5SJ4118-7HG40 (Siemens)
• Poles: 1 (Single-Pole)
• Rated Current: 15 A
• Voltage Rating: Up to 240 VAC (UL 489) and 60 VDC maximum
• Interrupting Capacity: 14 kA short-circuit current rating (Icn)
• Trip Curve: C-characteristic for balanced protection and performance
• Dimensions (H × W × D): ~90 mm × 18 mm × 70 mm
• Mounting: Standard DIN rail
• Connection: Screw terminals for secure line/load wiring

Material Compliance and Certifications

• Industry Standards: This Siemens breaker is engineered to meet international safety and quality standards, including UL 489, CSA C22.2 No. 5-02, and relevant IEC/EN 60898 & IEC/EN 60947-2 norms.
• Environmental Compliance: It features touch protection in accordance with EN standards and complies with applicable RoHS and REACH environmental directives, ensuring safe use and reduced exposure to harmful substances.

Where It Works Best

• The 5SJ4118-7HG40 excels in branch circuit protection for residential, commercial, and light industrial installations. It’s especially well-suited for panel board applications, control cabinets, equipment feeder circuits, and secondary distribution systems where dependable overcurrent protection is required without bulky equipment. Whether you are protecting lighting circuits, small machine loads, or auxiliary systems, this breaker offers a reliable balance of performance and simplicity.